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प्रश्न
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
उत्तर
All living organisms existing on earth show immense diversity in size, form, structure and morphological features but at the molecular level, these organisms exhibit unbelievable similarity. For instance, these organisms are made up of the basic biomolecules like DNA, RNA, carbohydrates, proteins etc. which show remarkable similarity in all of them. DNA in all organisms is made up of same units (nucleotides) and has the same double-helical structure. So, evolution has exhibited a greater stability of molecular structure when compared with morphological structures.
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संबंधित प्रश्न
State the connecting links between Peripatus with Annelida and Arthopoda.
(a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent.
Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?
How analogy and homology considered as an evidence in support of evolution ?
Select a set of homologous organs from the following:
(A) Wings of a bat and wings of a butterfly
(B) Wings of a pigeon and wings of a bat
(C) Wings of a butterfly and wings of a pigeon
(D) Forelimbs of a duck, forelimbs of a cow and forelimbs of a lizard
Explain any three molecular (genetic) evidences in favour of organic evolution.
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
Pick the odd man out:
Write names of some vestigial organs in the human body.
